The pillow itself is made of shredded memory foam, which you can add or remove for a very customized fit. (geekwrapped.com)
The two pack of pillows contains shredded memory foam like many of the others on this list. (geekwrapped.com)
Most products use shredded memory foam as it guarantees better airflow, but others also have layers of different kinds of memory foam to ensure ample support and breath - ability. (pillowsforlife.com)